error After SAVE method, COMMIT WORK or ROLLBACK WORK must be executed

Hi Experts,

I am doing the migration program for the service Order Create using the BAPI 'BAPI_ALM_ORDER_MAINTAIN'. After the BAPI i am calling the FM

'ALM_ME_COMMIT_OR_ROLLBACK' it will commit or Rollback bassed on the Return table what i am getting from the BAPI.

This was working fine. But when i run it in the Bulk order i mean 700 service order some orders i am getting success message. But few orders like 50 orders i am getting the below error message.

"After SAVE method, COMMIT WORK or ROLLBACK WORK must be executed".

when i refer the FM 'ALM_ME_COMMIT_OR_ROLLBACK' they have used bapi_transaction_commit statement and wait also.

But i dont know why i am getting the error message. can you please adivce

Thanks,

Dhina..